George Marshall Parker Jr. (April 17, 1889 – October 23, 1968) was an officer of the United States Army with the rank of major general.

[2] Parker was assigned to the Philippines shortly before the Japanese invasion and was promoted to brigadier general in April 1941.

[3] The 41st Division was centered around Nasugbu, Batangas and Tagaytay Ridge to meet any landings by the Japanese on the western shores of Southern Luzon, while the 51st was assigned on the eastern shores of in the event the Japanese would land in the vicinity of Lamon Bay.

On December 23, two weeks after the Japanese landings, the SLF was ordered to Bataan as General Douglas MacArthur activated War Plan Orange.

On December 24 Parker was appointed commander of the Bataan Defense Force (BDF) and promoted to major general.